刨花切削参数对杨木刨花质量的影响  

Impact of Flaking Parameters on Aspen Strand Qualities

作　　者：何雨晨 郑圣龙 李园 郭兆辉 崔茂利 金正洪 孙学权 解林坤[1] 秦磊[1] 杜官本[1] 万辉 HE Yu-chen;ZHENG Sheng-long;LI Yuan;GUO Zhao-hui;CUI Mao-li;JIN Zheng-hong;SUN Xue-quan;XIE Lin-kun;Qin Lei;DU Guan-ben;WAN Hui(College of Materials Science and Engineering,Southwest Forestry University,Kunming 650223,Yunnan,P.R.China;Kunming Panel Artificial Board Co.,Ltd.,Kunming 650403,Yunnan,P.R.China)

机构地区：[1]西南林业大学材料与化学工程学院,云南昆明650223 [2]昆明飞林人造板集团有限公司,云南昆明650403

出　　处：《林产工业》2024年第4期13-21,共9页China Forest Products Industry

基　　金：云南省人才培养专项(80201402);校级科研专项(111927);云南省基础研究计划面上项目(202401AT070292)。

摘　　要：为探究木材温度、飞刀刃角、底刀刃角在弦向切削和纵向切削过程中对白杨(Populus tremuloides,Michx.)大片刨花卷曲指数、抗拉强度和表面粗糙度的影响趋势,本文通过优化盘式刨片机工作参数和切削工艺提高刨花质量和木材资源利用率,并降低切削能耗。结果表明:较低木材温度导致刨花有较高的卷曲度;在32°飞刀刃角下切削的刨花卷曲度低于27°;底刀刃角的增加减小了刨花卷曲的趋势;纵向切削刨花会使刨花卷曲度和抗拉强度降低。卷曲主要是由不平衡的切削应力引起的。在切削时,刨花面临刀刃的一侧由于刀尖的深入产生拉伸应力,而在刨花的另一面产生压缩应力。这种应力差别导致了面临刀刃的刨花一侧产生裂纹,进而在刨花干燥和润湿过程中造成刨花两侧的膨胀和收缩压力的不同,从而导致刨花发生卷曲。In order to evaluate the impact of wood temperature,the flaking knife sharpness angle,counter knife angle in tangential flaking perpendicular to wood grain and longitudinal flaking along the wood grain on the strand folding,tensile strength,and surface roughness of Aspen wood,this paper improved the quality of shavings and the utilization of wood resources by optimizing the working parameters and cutting process of the disc shaper,and reduced cutting energy consumption.The results showed that lower wood temperatures resulted in higher strand folding.The folding of the strands at the 32°knife sharpness angle was lower than at 27°.With the increase of the counter knife angle,the folding of the wood strands reduced.Longitudinal or radial flaking reduced the folding and the tensile strength of the wood strands.The folding of strands was mainly caused by unbalanced cutting stress.The flaking stress mainly generated cracks on one side of the wood strands or the side facing flaking knife,which then caused different swelling and shrinking patterns of two strand surfaces during the drying and wetting the strands,thus causing the strand folding.

关 键 词：切削参数 定向刨花板 卷曲 弦向切削 纵向切削 

分 类 号：TS653[轻工技术与工程] TS396